Variant chr4-143577798-C-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001168235.2(FREM3):c.6233G>T(p.Arg2078Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000651 in 1,537,184 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R2078H) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000029 ( 0 hom. )

Consequence

FREM3
NM_001168235.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.722

Variant links:

Genes affected

FREM3 (HGNC:25172): (FRAS1 related extracellular matrix 3) This gene encodes an integral membrane protein containing numerous CSPG (chondroitin sulfate proteoglycan element) repeats and Calx-beta domains. The protein belongs to the family of FRAS1/FREM extracellular matrix proteins and may play a role cell adhesion. [provided by RefSeq, Feb 2017]

FREM3 links:

ENSG00000251600 (HGNC:):

ENSG00000251600 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1025393).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FREM3	NM_001168235.2 linkuse as main transcript	c.6233G>T	p.Arg2078Leu	missense_variant	8/8	ENST00000329798.5	NP_001161707.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
FREM3	ENST00000329798.5 linkuse as main transcript	c.6233G>T	p.Arg2078Leu	missense_variant	8/8	5	NM_001168235.2	ENSP00000332886.5	P0C091
ENSG00000251600	ENST00000511042.5 linkuse as main transcript	n.191+5217C>A		intron_variant		5
ENSG00000251600	ENST00000641328.1 linkuse as main transcript	n.861+5217C>A		intron_variant

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152238

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD4 exome

AF:

0.00000289

AC:

AN:

1384946

Hom.:

Cov.:

AF XY:

0.00000293

AC XY:

AN XY:

683406

show subpopulations

Gnomad4 AFR exome

AF:

0.000127

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152238

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74380

show subpopulations

Gnomad4 AFR

AF:

0.0000482

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.0000663

Hom.:

Bravo

AF:

0.0000680

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 23, 2024

The c.6233G>T (p.R2078L) alteration is located in exon 8 (coding exon 8) of the FREM3 gene. This alteration results from a G to T substitution at nucleotide position 6233, causing the arginine (R) at amino acid position 2078 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.66

CADD

Benign

0.028

DANN

Benign

0.83

DEOGEN2

Benign

0.0037

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.036

LIST_S2

Uncertain

0.92

M_CAP

Benign

0.0066

MetaRNN

Benign

0.10

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

PrimateAI

Benign

0.18

PROVEAN

Benign

-1.3

REVEL

Benign

0.021

Sift

Benign

0.40

Sift4G

Uncertain

0.058

Vest4

0.16

MutPred

0.58

Gain of glycosylation at T2081 (P = 0.0482);

MVP

0.048

ClinPred

0.055

GERP RS

-8.5

Varity_R

0.042

gMVP

0.33

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over